JPH1158371A - Device and method for manufacturing polyurethane material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high pressure self-cleaning and mixing device for manufacturing molding parts of a polyurethane material product containing a filler. SOLUTION: In a high pressure self-cleaning and mixing device for manufacturing a reinforced polyurethane mixture, a fluidized filling material is blended with a polyurethane mixture, and the device is provided at least with a mixing chamber for mixing first and second polyurethane components together, a discharge duct (In that case, a chamber is opened on the rear terminal of the discharge duct.), a narrow and long cleaning member movable reciprocatingly in the discharge duct and a feeding channel for feeding a fluidized filler material between the forward moving position for closing the mixing chamber and the backward moving position for opening the mixing chamber toward the discharge duct and extending in the vertical direction of a cleaning member. The feed channel is opened on a mixing area on the rear terminal of the discharge duct close to an outlet opening of the mixing chamber, and the polyurethane mixture is discharged from the mixing chamber into the discharge duct under the high turbulent flow condition.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method and an apparatus for producing a polyurethane mixture for use in producing structural panels or molded parts, such as door panels for automobiles or other vehicles.

[0002]

BACKGROUND OF THE INVENTION Inert filler materials (e.g., reinforcing fibers)
It is often used in the manufacture of structural panels or, more generally, molded parts of reinforced polyurethane materials. The inert filler material improves both the stiffness and mechanical properties of the reinforced polyurethane material molded parts and structural panels.

[0003] When fillers are used in molded products, there are often problems in obtaining a sufficient mixture of the filler and the chemical reactants, especially when the filler is long or brittle.

[0004] GB-A-1,245,216 and US Patent 4,397,40
No. 7 discusses a method of embedding a flowable filler material in a moldable mixture of reactive chemical components.

In GB-A-1,245,216, a filling material of reinforcing fibers is supplied directly to a mixing chamber. These reactive chemical components are injected into the mixing chamber at right angles to the reinforcing fibers as they flow through the mixing chamber.

This method is inadequate, especially when the filling material is supplied in large quantities and contains long or very long fibers. The air flow that transports the filler, and the filler material itself, prevents close contact and uniform mixing of the reactive chemical components with the filler. As a result, the obtained molded product
Includes defects that lose their commercial value.

[0007] US Patent No. 4,397,407, in contrast, discloses that a foaming mixture of reactive chemical components is first prepared in a separate high pressure mixing chamber and then fed by a long duct to an annular chamber. Describes a method of compounding this reactive chemical mixture with a filler (eg, granular material or reinforced short fibers). The supply duct is formed by a movable tubular element that communicates with one side of the annular chamber, is opposite the discharge duct, and is connected to the mixing chamber by another channel.

This procedure also has poor mixing of the filler with the reactants. In fact, if the reactive liquid mixture comes into contact with the flow of the filler or filler material, the reactive liquid mixture loses most of its turbulence and kinetic energy inside the long supply duct. Would. By the time the reactants and filler are combined, they are both
It exhibits a substantially parallel flow.

The above mixing procedure is also inadequate when the filler is composed of delicate materials (eg, glass fibers) that require a simple, linear path without significant curves and deflections.

US Pat. No. 4,332,335, the entire disclosure of which is incorporated herein by reference, describes a head for mixing and discharging reactive liquid components. The described device features a small mixing chamber separate from the discharge duct, in which the mixing chamber is mixed under high turbulent conditions in order to prevent problems resulting from incomplete mixing of the reactive liquid components. In use of this mixing head, the flow of the mixture is controlled by reciprocating the mixing head.
Directly poured into the closed cavity of the mold or poured into the open mold.

GB-A-1,579,543 and WO-A-96 / 35562
Other devices are described, in which a tubular flow of liquid polyurethane material passes through an annular duct and flows axially outside the duct through a supply channel concentrically arranged in the annular duct. It comes into contact with the reinforcing fibers.

In particular, WO-A-96 / 35562 (hereinafter "WO'562") describes a device for producing molded parts of a moldable synthetic material containing reinforced long fibers, and a high-pressure mixing head. Can be used in the production of polyurethane materials. In WO'562, the polyurethane mixing chamber is connected via an intermediate duct to an annular discharge duct, so that the reactive polyurethane mixture is separately prepared and, in the form of a tubular flow, is connected to the discharge duct. Supplied. The tubular stream of the reactive polyurethane mixture then comes into contact with the fiber reinforced material.

According to the example of FIGS. 1 and 2 of WO'562, the filler reinforcing fibers are separated by a separate pipe member (along a cleaning member which reciprocates inside the annular duct and discharges the mixture). Through which it extends coaxially).

The use of a separate movable cleaning member to supply the reinforcing fibers can severely limit the performance of this type of device. This is because the tubular cleaning member includes inner and outer surfaces attached to the cylindrical surface of the annular discharge duct. These surfaces are completely wetted by the polyurethane mixture during each feeding step. A film of the mixture remains between the interfaces, thus tending to cause the cleaning element to adhere strongly to the two surfaces of the annular duct, thereby completely hindering the movement of the cleaning element. To avoid this interference problem, a large hydraulic cylinder must be used for the cleaning member. The hydraulic cylinder must be able to exert a strong enough force to release the cleaning member during the backward movement of the cleaning member. The need to use hydraulic cylinders with these capabilities increases the overall weight of the mixing device and makes it more difficult to reciprocate the mixing device over the mold cavity.

Furthermore, consider the fact that the adhesion between the contact surface of the discharge duct and the cleaning member, whose length is equal to or greater than five times its diameter, exceeds the tensile stress of steel. It should then be concluded that the dimensions of the resistance cross-section of the cleaning member must be considerably higher in order to prevent the tubular cleaning member and the fiber feed pipe member from being broken or damaged.

Finally, in WO'562, between the annular duct discharging the polyurethane mixture and its mixing chamber,
The use of an intermediate connecting duct slows the flow of the polyurethane mixture so that the reinforcing fibers are not effectively mixed with the reaction mixture and are not uniformly wetted.

Furthermore, this intermediate connection duct requires a cleaning member for itself and a corresponding hydraulically operated cylinder.

All these factors complicate the design of the mixing device and add considerably to the weight and dimensions of the device itself.

[0019] WO '562 suggests that the design of the device can be simplified by connecting the mixing chamber directly to the discharge duct and extending the pipe member supplying the reinforcing fibers therein. However, this design still
There are disadvantages mentioned above.

[0020] Accordingly, WO'562 does not disclose the design of a suitable lightweight device capable of improving filler wetting and operating conditions. The general teaching of WO'562 is limited to providing a centrally located, separate fiber feed pipe, which extends axially beyond and through a longitudinal hole in the cleaning member. , Polyurethane mixture,
The entire annular discharge duct protrudes and extends to form inside a tubular flow surrounding a central flow of reinforcing fibers having both a tubular flow and a central flow moving coaxially in the same direction.

In the general manufacture of molded parts of polyurethane material, especially in molded parts containing flowable fillers, very lightweight equipment or mixing devices which are simple to design, as well as polyurethane mixtures and Mix the filling material to a high degree with the liquid polyurethane mixture before the filling material reaches the interior cavity of the mold or is poured onto the surface of the underlying substrate and has a fillable device or mixing device That is very important.

Weight is an essential factor in the use of such a mixing device. This is because the mixing device is typically operated above its substrate surface by a reciprocating arm of a positioning device (eg, a robotic device). The mixing device will move quickly if the device is subject to sudden changes in direction and strong braking and accelerating forces at each reversal of motion, so that undesired accumulation of material does not occur locally. It must reciprocate in various directions along a given path.

In addition, in the manufacture of large components (eg, car door panels), a significant number of components are typically provided by the mixing device to cover the entire surface of the mold.
It is necessary to make a stroke (for example, 10 or more). Such movement often also occurs in a very short time (eg, 8-10 seconds) to complete its release before the polyurethane mixture begins to react.

A common use of a mixing device for adding fillers to polyurethane materials, as described in DE-A-19618393 and DE-U-29704560, is to obtain the resulting polyurethane-filler material mixture, which comprises (Which must be distributed over the surface of a substrate placed in or below the cavity of the mold) tends to assume a substantially conical or flat shape. The area of this stream depends on the design of the mixing device and its mixing process, as well as on how the two streams are combined or mixed together. Thus, the width of the surface coverage in each direction of each stroke of the mixing device on the underlying substrate in a given direction is not only the distance between the same mixing device and the underlying substrate, but also It depends to a large extent on the properties of the filled filler and / or reinforcing material, and on the manner in which the polyurethane mixture and filler are combined or compounded.

In general, the width of the surface coverage of each stroke cannot be controlled in any way. Therefore, when manufacturing large panels or large area components, the mixing equipment
Several strokes must be performed while reciprocating across the underlying substrate. The mixing device must coat the underlying substrate within a very short time before the polyurethane material begins to react.

Due to the considerable weight of the mixing device, as well as the inertial forces generated during each change or reversal of the movement, a very robust and bulky operating system is required. further,
At the high speeds at which the mixing device travels, the distribution of the mixed materials can, in some cases, be uneven, resulting in an unsatisfactory product.
Finally, the polyurethane-filler mixture has little or no tendency to flow over its deposition surface, especially when the filler is composed of long fibers. Thus, this mixture
It tends to remain in the first deposited area. It is therefore essential to have a mixing device which is not only lightweight and simple in design, but at the same time can supply a large amount of polyurethane mixture in a very short time. When compounding the filling material with the polyurethane mixture, the filling material (especially when composed of long fibers) is used to ensure good filling and substantially uniform distribution within a short time. It is also important that the polyurethane mixture be substantially uniformly filled and wetted within the same mixing device. These properties are necessary to achieve optimal structural properties in the resulting fabricated panel or molded part.

[0027]

Accordingly, it is an object of the present invention to provide a high pressure self-cleaning mixing apparatus for producing molded parts of polyurethane material containing fillers. This mixing device answers the need for a very lightweight device with a simple design. This design also allows for rapid displacement during each reversal or change in motion of the device without creating significant resistance to acceleration.

Another object of the present invention is to provide a mixing device which improves the filling of the filler in the mixing device.
This filling occurs in the molded part under high turbulent conditions such that the filler is strongly bonded to the polyurethane material of the molded composite part.

It is yet another object of the present invention to provide a high pressure self-cleaning mixing device for practical and universal use. Any type or nature of fluidizing filler material,
The device can be further supplied by an air stream transported over the stream.

Thus, the device of the present invention can be used for many applications. For example, it can be used in molding a wide range of mechanical or structural parts. The device can also be used with both rigid and flexible types of expanded foam, in which the filler can be advantageous in new, reused or recycled materials, and therefore more economical Enables the production of compact and relatively low cost molded parts.

Another object of the invention is to provide a method and an apparatus for the production of polyurethane materials, and to obtain in a short time the deposition of this mixture on a large area of a substrate or a mold cavity. It is in. The method of the present invention can be performed in a relatively short time while uniformly distributing this mixture during deposition. All of this is achieved without a cumbersome and complicated operating system for moving the mixing device itself.

Another object of the present invention is a method and apparatus as defined above, wherein the mixing device can move at a relatively low speed, and thus is associated with inertia phenomena and reversals or changes in the motion of the device. It is an object of the present invention to provide a method and an apparatus which have reduced the above problems.

Yet another object of the present invention is a method and an apparatus for producing a polyurethane material as defined above, which further allows for a uniform distribution of the sprayed or deposited material, and A method and apparatus for producing good-quality products and permitting the appropriate control of the spraying or deposition of the released polyurethane material and / or the reinforcing material transported in the stream, e.g. To provide.

Still another object of the present invention is a method and apparatus as defined above, comprising the dimensional characteristics, the shape of the mold or molded part, and the relationship between the apparatus and the mold on which the deposition occurs on its surface. It is an object of the present invention to provide both a method and an apparatus which allow the control of the deposition of the polyurethane material and / or the reinforcing material transported on the stream, depending on the relative movement required between them.

[0035]

SUMMARY OF THE INVENTION A high pressure self-cleaning mixing apparatus for producing a reinforced polyurethane mixture according to the present invention comprises mixing a fluidized filler material with the polyurethane mixture in at least the first and second polyurethane components. A mixing chamber for mixing; a discharge duct (the mixing chamber is open at the rear end of the discharge duct); an advanced position for closing the mixing chamber, and a retracted position for opening the mixing chamber towards the discharge duct. An elongate cleaning member reciprocable in said discharge duct between; and a supply channel for supplying fluidized filler material, said supply channel extending longitudinally relative to said cleaning member; Here, the supply channel opens into the mixing area at the rear end of the discharge duct close to the outlet opening of the mixing chamber, and In, the polyurethane mixture,
Under high turbulence conditions, the mixing chamber exits into the discharge duct.

In a preferred embodiment of the invention, the supply channel is provided as one single part with the elongated cleaning member.

[0037] In a preferred embodiment of the present invention, a means for diverting the flow of the polyurethane mixture exiting the mixing chamber is provided at the forward end of the cleaning member.

In a preferred embodiment of the invention, the means for diverting the flow comprises a conical surface tapering in the direction of flow of the mixture in the discharge duct.

In a preferred embodiment of the invention, the conical surface defines, at the rear end of the discharge duct, an annular channel for distributing the polyurethane mixture.

In a preferred embodiment of the present invention, the apparatus further comprises means for adjusting the position of the front end of the cleaning member with respect to the outlet opening of the mixing chamber.

In a preferred embodiment of the present invention, the cleaning member is connected to a reciprocating piston of a control cylinder, whereby the stop position of the cleaning member is adjusted by the reciprocation of the control cylinder of the cleaning member. Means for adjusting the piston to the retracted position is further included.

In a preferred embodiment of the present invention, the discharge duct has a length of not more than twice its diameter.

In a preferred embodiment of the invention, the supply channel is provided by a longitudinally extending hole on one side of the cleaning member with respect to the axis of the discharge duct.

In a preferred embodiment of the present invention, the vertical hole of the cleaning member is offset from a side of the discharge duct opposite to an outlet opening of the mixing chamber.

In another aspect of the present invention, a high pressure self-cleaning mixing device for producing the fiber reinforced polyurethane material of the present invention comprises: a mixing chamber for mixing at least a first and a second polyurethane component; A cleaning member and first control means for reciprocating the first cleaning member in the mixing chamber; a discharge duct extending at an angle toward an outlet opening of the mixing chamber; a second cleaning member. And a second control means for reciprocating the second cleaning member in the discharge duct; a fiber supply channel movably supported by the cleaning member of the discharge duct from an advanced state and a retracted state. The fibers extending longitudinally in the second cleaning member and axially open in the retracted state of the second cleaning member in proximity to an outlet opening of the mixing chamber. Supply channel; and, including in the longitudinal direction of said discharging duct to divert the flow of polyurethane mixture emerging from the mixing chamber, a surface member at the front end of said second cleaning member.

In a preferred embodiment of the present invention, the surface member for diverting the flow of the polyurethane mixture includes a conical surface at a front end of the cleaning member of the discharge duct.

In a preferred embodiment of the present invention, the apparatus further comprises an annular channel for distributing the polyurethane mixture from the mixing chamber to the discharge duct, wherein the annular channel has a conical tip of the second cleaning member. And a rear surface of the discharge duct proximal to the outlet opening of the mixing chamber.

[0048] In a preferred embodiment of the invention, the mixing chamber further comprises an adjustable throttle member which throttles the outlet opening, whereby the throttle member includes the cleaning member of the discharge duct.

[0049] In a preferred embodiment of the present invention, the fiber supply channel extends on one side of the cleaning member in a longitudinal direction with respect to the discharge duct.

In a preferred embodiment of the present invention, the control means for the cleaning member of the discharge duct includes a reciprocating piston of a control cylinder, whereby the fiber supply channel is connected to the cleaning member for the discharge duct. At the rear end as a single part with
Extending through the piston member of the control cylinder.

In another aspect of the invention, the invention is a method of making a reinforced polyurethane material, comprising: providing a flow mixture of at least a first and a second polyurethane component; Compounding with the material stream; distributing the product stream of the filler and the polyurethane blend material to the forming surface; and, during the dispensing, the material stream with at least one air jet. A method is provided that includes deflecting laterally by impacting.

In a preferred embodiment of the present invention, the method further comprises the step of deflecting the product stream with intermittent air jets.

In a preferred embodiment of the invention, the product stream is diverted alternately in opposite directions.

In a preferred embodiment of the invention, the product stream is diverted by an intermittent air jet at a frequency above about 20 Hz.

In a preferred embodiment of the present invention, the frequency of the intermittent air jet ranges from about 20 Hz to about 60 Hz.

In a preferred embodiment of the invention, the product stream is diverted with intermittent air jets at a frequency greater than about 60 Hz.

In a preferred embodiment of the invention, the product stream is diverted laterally by a continuous air jet.

In a preferred embodiment of the invention, the product stream is deflected and distributed by a mixing device onto an underlying shaped surface by reciprocating movement of the same mixing device, Have a higher frequency than the reciprocating motion of the mixing device.

In a preferred embodiment of the invention, at least one of said air jets is temporarily interrupted at a predetermined position during movement of said mixing device.

In another aspect of the present invention, a mixing apparatus for producing the polyurethane mixture of the present invention comprises: a mixing device having a mixing chamber and a discharge duct for the flow of the polyurethane mixture from the mixing chamber; Air jet generating means for diverting the produced flow of the delivered mixed material to the side.

[0061] In a preferred embodiment of the invention, the air jet generating means comprises at least one air blowing nozzle, whereby the nozzle generates a mixed stream of mixed material delivered on the forming surface. An air jet collides with the side.

[0062] In a preferred embodiment of the present invention, the apparatus further includes valve control means for connecting the air jet generating means to a compressed air source.

[0063] In a preferred embodiment of the present invention, the apparatus further comprises at least first and second blow nozzles for generating an air jet on the opposite side of the product stream of the compound material, wherein the blow nozzles are connected to a compressed air source. Further comprising a programmed control means for selectively connecting to

In a preferred embodiment of the present invention, the control means is programmed to alternately connect the nozzle to the compressed air source.

[0065] In a preferred embodiment of the present invention, the blowing nozzle is supported in an adjustable manner by the mixing device.

In a preferred embodiment of the present invention, the blowing nozzle is supported in an orientable manner by the mixing device.

In a preferred embodiment of the present invention, the blowing nozzle is oriented at right angles to the product stream of the compounding material.

In a preferred embodiment of the present invention, when the material is delivered onto an underlying shaped surface, the blowing nozzle is angled toward the direction of the product flow of the compounded material. Oriented.

In a preferred embodiment of the present invention, the control means selectively enables either simultaneous or alternating air jets beside the product stream of the compounding material. Be programmed.

[0070] In a preferred embodiment of the present invention, the mixing device is a high-pressure mixing device.

In a preferred embodiment of the present invention, the mixing device is a low-pressure mixing device.

In a preferred embodiment of the present invention, the means for supplying the filling material includes a supply conduit coaxially arranged with respect to the discharge duct and an opening to the discharge duct.

In a preferred embodiment of the present invention, the means for supplying the filling material is arranged on a side of the mixing device.

In another aspect of the present invention, a mixing apparatus for producing the reinforced polyurethane mixture of the present invention comprises: a mixing device having a mixing chamber and a discharge duct for the flow of the polyurethane mixture from the mixing chamber; Means for feeding and mixing into the stream of polyurethane mixture delivered by the mixing device; and means for generating air jets for deflecting the product stream of compounded material delivered by the mixing device and the feeding means laterally.

In another aspect of the present invention, a high-pressure self-cleaning mixing device for producing the reinforced polyurethane mixture of the present invention comprises: a mixing chamber for mixing at least the first and second polyurethane components; a discharge duct (the mixing An elongate cleaning member reciprocable between an advanced position for closing the mixing chamber and a retracted position for opening the mixing chamber toward the discharge duct; a chamber is open at a rear end of the discharge duct); And a supply channel for supplying a fluidized fill material, the supply channel extending longitudinally with respect to the cleaning member, such that the supply channel is at an outlet opening of the mixing chamber. Open to the rear end of the discharge duct in close proximity, whereby the polyurethane mixture exits the mixing chamber under high turbulence conditions and exits the discharge duct. It flows to bets and the device,
At the outlet of the mixing device, it further comprises an air jet generating means for diverting the flow of the compound material to the side.

In another aspect of the present invention, a high pressure self-cleaning mixing device for producing the fiber reinforced polyurethane material of the present invention comprises: a mixing chamber for mixing at least a first and a second polyurethane component; a first cleaning member; And a first control means for reciprocating the first cleaning member in the mixing chamber; a discharge duct extending at an angle from an outlet opening of the mixing chamber; a second cleaning member, and a discharge duct. Second control means for reciprocating the second cleaning member; a fiber supply channel movably supported by the second cleaning member of the discharge duct, wherein the fiber supply channel is longitudinally moved in the second cleaning member. A fiber feed channel extending axially open at a rear end of the discharge duct in a retracted position of the second cleaning member, adjacent to an outlet opening of the mixing chamber. A surface member at the front end of the second cleaning member for diverting the flow of the polyurethane mixture exiting the mixing chamber; and an air jet for deflecting the product flow of the compounded material to the side at the outlet of the mixing device. Including generating means.

The operation of the present invention will be described below.

A first innovative aspect of the invention consists in co-injecting or co-injecting the polyurethane mixture and the non-reactive filling material, which can be achieved with specially designed mixing equipment, In the mixing device, the junction of the polyurethane mixture and the filler can be maintained near the mixing chamber to improve the wetting or saturation of the filler before the blend reaches the mold surface.

A second innovative aspect of the present invention resides in the use of an air jet to divert the flow of a polyurethane mixture, or of a blended mixture of polyurethane and a filler material, whereby the repetition of the mixing device is achieved. The movement allows the mixture to be deposited and controlled in a short time on a large-area substrate or into a mold cavity.

Other objects, features and characteristics of the present invention will become apparent from the following description and appended claims, taken in conjunction with the accompanying drawings, all of which are incorporated herein by reference. Form a part, wherein reference numerals indicate corresponding parts in the various drawings.

[0081]

DETAILED DESCRIPTION OF THE INVENTION For the purposes of the present invention, the term "filler"
Is understood to mean any solid, inert, flowable material, which also includes any material that can be transported by an air or gas stream. Such a filling material
It can be used for filling and strengthening purposes and can be appropriately pretreated waste material. Accordingly, the filler material can be a powder, granules, fibers of various lengths, continuous fibers, or any other suitable material that can be fluidized by an air stream (e.g., natural or synthetic fibers, finely ground synthetic materials or (Regenerated foam, finely chopped wood, ground cork, or sawdust, etc.).

For the purposes of the present invention, the term “long fiber” is
It is understood that fibers of equal to or longer than 5 mm and up to several centimeters or more are meant, including the use of continuous fibers.

A detailed description of a preferred embodiment of the invention is provided below.

According to a first embodiment of the invention, a high-pressure self-cleaning mixing device produces a polyurethane mixture containing fillers or reinforcing materials. The apparatus is supplied with a fluidized filler and is compounded with a chemically reactive polyurethane mixture. The resulting mixture is then fed into a substrate or cavity of a mold. The device according to this first embodiment of the invention comprises a mixing chamber in which at least the first and second polyurethane components are mixed. The mixture then flows into a discharge duct connected to the mixing chamber and into a second mixing area at the rear end of the discharge duct.
An elongate cleaning member located in the discharge duct is reciprocally movable between a forward position closing the outlet of the mixing chamber and a retracted position opening the outlet of the mixing chamber toward the discharge duct. The channel means for supplying the fluidized filling material extends longitudinally with respect to the cleaning member of the discharge duct, and at the outlet opening of the mixing chamber when the cleaning member retracts. Open directly into the mixing area of the duct. The flow of filler material from the feed channel is co-injected with the polyurethane mixture and collides with the polyurethane mixture exiting the mixing chamber under high turbulence conditions.

According to a preferred embodiment of the present invention, the channel for supplying the filling material is provided by a shaft bore extending longitudinally along the length of the cleaning member provided in the discharge duct. You. In this way, the cleaning element and the supply channel for the filler can be advantageously formed as a single element that can withstand considerable mechanical resistance, which can withstand high axial stresses. The filler supply channel may be coaxially arranged with the cleaning member or offset toward one side of the discharge duct (eg, toward the side opposite the mixing chamber).

The front end of the cleaning member (where the supply channel for the fluidized packing material is open)
When the cleaning member is in the retracted state, it may terminate in a cylindrical surface positioned flush with the upper wall of the mixing chamber. On the other hand, the front end may end with a shaped surface (eg, a conical surface). Such a shaped surface directs the flow of the polyurethane mixture exiting the mixing chamber in a direction controlled by the shaped surface. When the shaped surface is conical and faces the outlet opening of the mixing chamber,
At the rear mixing area of the discharge duct, where the flow of the filler impinges on the flow of the polyurethane mixture exiting the mixing chamber, as shown in FIG. Off from the opening of the supply channel for the filling material and then to the discharge duct. This design reduces the risk that the polyurethane mixture will partially stop in the feed channel and block it.

The mixing device may also be provided with means for changing and adjusting the position of the cleaning member, whereby
The position of the forward end relative to the outlet forms the mixing chamber. By adjusting the position of the cleaning member, the flow state of the polyurethane mixture exiting the mixing chamber can also be changed. This, in turn,
In effect, the turbulence of the polyurethane mixture changes in areas where the polyurethane mixture impinges and intersects the flow of fluidized filler material exiting the supply channel of the cleaning member and entering the discharge duct along it. .

According to another aspect, the invention resides in the use of an air jet appropriately directed at the product stream of the filler and / or polyurethane mixture exiting the discharge duct. The air jets are positioned to divert the flow of the mixture to one or more sides of the discharge duct. For example, continuous air jets and / or alternating air jets can be activated during discharge at various times, for example, while moving the mixing device along a predetermined path, thereby forming a mold of the resulting mixture. The release onto the cavity or the underlying substrate surface is moved in the desired manner.

According to another preferred embodiment, the present invention relates to a high-pressure mixing device for producing molded articles of polyurethane material, for example, using reinforced long fibers composed of glass fibers or carbon fibers.

For example, a first embodiment of the device and the general principle of the present invention in connection with the production of a polyurethane material containing a filler composed of reinforced long fibers will be described with reference to FIGS. explain.

The same apparatus of FIGS. 1 and 2 can be used to produce a polyurethane material using any type of non-reactive filler material. This device offers a simple solution in the design of lightweight mixing heads, which is reliable in operation and has a wide range of different fillers with little or no improvement in the supply of this filler. Can be used freely.

As shown in the above figures, the apparatus for producing a polyurethane mixture using reinforcing fibers according to the invention essentially comprises a small-size mixing chamber 11 having a diameter in the range from 5 mm to 20 mm. High pressure self-cleaning mixing device 10
Is provided. The mixing chamber 11 has a cylindrical discharge duct 12
Open directly into a second mixing area at the rear or back end of the main cleaning member or plug member.
When 27 retreats, it opens. The longitudinal axis of the discharge duct is arranged at an angle of approximately 90 ° to the longitudinal axis of the mixing chamber.

This mixing chamber 11 is substantially cylindrical. A relatively small hole of the same diameter as the mixing chamber 11 extends from the rear of the mixing chamber 11 to the body 10 to allow reciprocating movement of the first cleaning member 13. This first cleaning member 13 is a hydraulically operated cylinder
It is shaped in the form of a cylindrical plug connected to 15 pistons 14.

According to a preferred embodiment, the length of the mixing chamber 11 is approximately equal to or less than about twice the diameter of the hole. The length of the mixing chamber 11 is
Substantially corresponding to a short stroke of the cleaning member 13, the cleaning member 13 can therefore be moved rapidly between the retracted position and the advanced position. In the retracted position shown in FIGS. 1 and 2, the cleaning member 13 opens the nozzles of the polyurethane component injectors 16 and 17. In the retracted position, the cleaning member 13 also opens the outlet 11 ′ of the mixing chamber 11 towards the discharge duct 12. In its advanced position, the cleaning member 13 comprises the injectors 16 and 17,
And the outlet 11 'of the mixing chamber 11 is closed.

Each injector 16 and 17 is connected via metering pumps 18 and 19 to corresponding tanks 20 and 21 storing this polyurethane component, as schematically shown in FIG. These components can be supplied directly to the mixing chamber 11 or are made to recirculate through the longitudinal slots 22 and 23 of the cleaning member 13 and the corresponding regeneration ducts 24 and 25.

As mentioned above, according to a first aspect of the present invention, the apparatus is used, for example, for producing molded articles of polyurethane material filled with reinforced long fibers. According to this aspect of the invention, the stream of fibers 34 is co-injected or directly with the polyurethane mixture 35 in the mixing device at the high turbulent mixing area 12 'at the rear end of the discharge duct 12. Contacted. Due to this high turbulence,
While moving the fiber 34 along the discharge duct 12 towards the cavity of the underlying mold or substrate, the fiber 34
Can be filled into the polyurethane mixture 35 at a high ratio.

As a result, it is important that the polyurethane mixture 35 exiting the mixing chamber 11 maintain high turbulence conditions as it enters the mixing area 12 ′ of the discharge duct 12. It is also important that these high turbulence conditions be maintained along this discharge duct 12 as long as the outlet is open towards the mold cavity.

It is also important that the incoming stream of fibers 34 maintain a linear path and immediately contact or impinge on the stream of mixture 35 exiting the mixing chamber 11.

Thus, according to this embodiment of the invention,
The length of the discharge duct 12 should be as short as possible between the longitudinal axis of the mixing chamber 11 and the front end of the duct. In general, the length of the discharge duct 12 should be approximately equal to or less than twice its diameter, and the cross-sectional area of this duct 12 should be 2-5 times the cross-sectional area of the mixing chamber 11. Range.

As shown in the cross section of FIG.
12 extends rearward into a cylinder bore 26. The elongated cleaning member 27 is a piston of the corresponding hydraulic operation cylinder 29
28 and can reciprocate in the cylinder bore 26.

The cleaning member 27 has a shaft hole 30 for the supply fiber 34.
Having. The shaft hole 30 ends at the front end of the cleaning member 27,
There is an opening.

Therefore, the shaft hole 30 defines a supply channel of the fiber 34. The tubular extension 27 ′ is
It is formed as a single member having a piston 7 of the hydraulic cylinder 29 and continues to the rear side of the piston 28. The fiber feed channel tubular extension 27 ′ passes through the end wall of the cylinder 29 and terminates in a funnel-like member 31. The funnel-like member 31 is, for example, a roller-type feeder 32.
For introducing a bundle of fibers.

Finally, reference numeral 33 in FIG.
Is schematically shown from the supply device 32 along the supply channel 30 to the rear end of the discharge duct 12. In this mixing area 12 ',
At the rear end of the discharge duct 12, the fibers 34 impinge on the turbulence of the polyurethane mixture 35 exiting the mixing chamber 11. This polyurethane mixture 35 flows substantially at right angles to the flow of the fibers themselves.

Another aspect of the present invention is that the mixing chamber 11
Deflecting the polyurethane mixture so that the exiting polyurethane mixture does not flow over the fiber feed channel 30 and block it. According to this aspect, the forward end of the cleaning member 27 is aligned and appropriately tapered at or near the outlet opening 11 'of the mixing chamber 11 at the retracted position of the cleaning member 27 shown in FIG. The flow deflecting device also terminates in a shaping surface (eg, a conical surface 27 ").
The polyurethane mixture 35 exiting from the feed channel is distributed downstream and assists in distributing the fibers 34 immediately around and into the circle entering the feed channel. Therefore, the deflection of this flow is
This ensures that the fibers are filled with a high proportion of the polyurethane mixture along and along the rear end of the entire duct 12, helping to create optimal operating conditions for the mixing device.

The nature and length of the reinforcing fibers 34, and more generally the properties of the filler material supplied in an unfixed or fluidized state, depend on its molding requirements and the properties of the molded product to be produced. And change it. Occasionally, at the outlet 11 'of the mixing chamber 11, it is necessary to change the turbulence conditions of the polyurethane mixture in order to improve the filling conditions of the filler in the discharge duct 12. This change in turbulence can be achieved in various ways. For example, the outlet opening of the mixing chamber 11 can be narrowed by the cleaning member 27. The distal end of the cleaning member can be conical with respect to the top wall of the mixing chamber 11,
In an adjustable manner, it can be advanced slightly.

At the end, as shown schematically at 36 in FIG. 1, the piston of the hydraulic cylinder 29 of the cleaning member 27
It is possible to use adjustment means for 28. By changing the position of the front end of the cleaning member 27 with respect to the outlet 11 'of the mixing chamber 11, the degree of restriction of the discharge mixture is changed, and consequently the turbulent state of the polyurethane mixture and the reinforcing fibers Can be changed.

A second embodiment of the device according to the invention comprises:
Shown in FIG. 3 of the accompanying drawings, which relates to an improvement of the device of FIG.

The invention presented in FIGS. 1 and 3 has the common feature of the fiber supply channel 30 formed integrally with the cleaning member 27 as a single member. The invention presented in FIG. 3 shows that the outer cylindrical surface of this cleaning member 27 continues to its front end, and therefore, as shown by the same solid line in FIG. It differs from that of FIG. 1 in that it can be arranged in a plane.

In both cases, the outlet of the mixing chamber 11 can be throttled by appropriately changing the position of the front end of the cleaning member 27, as indicated by the dashed line 27 '''in FIG. . This can be achieved by adjusting the position of the stop device 36. In FIG. 1, the filler supply channel 30 is formed by a vertical hole and is offset towards the side of the discharge duct 12 opposite the mixing chamber 11. In contrast, in the case of FIG. 3, the channel 30 is provided by a well extending coaxially with the cleaning member 27.

FIG. 4 shows a general open mold 40 having a molding cavity 41 for molding a suitably shaped product. This cavity contains, for example, a filling material and
It can be used to mold panels composed of polyurethane foam containing / or reinforcing materials (eg, long or short glass fibers).

Reference numeral 10 denotes a high-pressure mixing device as an example.
(E.g., as described above), which can reciprocate in the direction of the double arrow along a distribution path that discharges a stream of polyurethane composite. The flow path of this material is
It depends on the specific shape of the mold and / or the product to be manufactured. In the example of FIG. 4, this distribution occurs by moving the device 10 along parallel bands, as shown schematically by the dashed lines. It is understood that any other type of mixing device can be used in place of the mixing device of FIGS. 1 and 3, provided that it is suitable for the purposes of the present invention.

According to a second aspect of the invention, as schematically shown in FIGS. 4 to 6, this band L is applied to two complementary strips L1 and L2, for example, in the longitudinal direction. Can be split. Each of these strips can be simultaneously covered with this stream of polyurethane material and reinforcing fibers during movement of the device 10, for example, to the right in FIG.

In accordance with this second aspect of the present invention, the polyurethane and fiber mixture 42 is provided with suitable blow nozzles 43 and 44 that deflect or divert the flow of material 42 exiting the discharge duct 12 of the apparatus. By using it, the band L can be arranged with a band L that is 2-3 times larger than that obtained with a conventional mixing device. These outlet nozzles can be, for example, on one or more sides or
It may be arranged on the side opposite to the longitudinal direction of L.
The outlet nozzles 43 and 44 are also provided in an intermittent or continuous mode,
It can be selectively connected to a compressed air source 45.

Using only one nozzle, an air jet set at a frequency higher than the frequency of the reciprocating motion of the mixing head 12 can divert the flow of the material 42 to one side of the mixing device. Although possible, it is generally preferred to use two or more outlet nozzles arranged in a variation around the outlet hole of the discharge duct 12. For example,
The two nozzles 43 and 44 are schematically shown in FIG. 5 as facing each other, so that the flow of material 42 can be deflected alternately to the right, left or another direction. . This arrangement allows the polyurethane material to be distributed substantially simultaneously and uniformly to either or both of the two strips L1 and L2 of the longitudinal band L.

Therefore, according to the example of FIGS. 5 and 6, these two blow-off nozzles 43 and 44 are, for example, solenoid valves 46 or other suitable valves (which are the two nozzles 43 and 44). (The flow of air can be stopped or changed rapidly between 44.)
Connected to 5. This entire operation process is performed by the logical control unit 4
7, can be managed or controlled.

The two nozzles 43 and 44 can be arranged below the outlet opening of the discharge duct 12 and are fixed to or supported by the device 10. These outlet nozzles 43 and 44 can be positioned at an appropriate distance from the mixture flow. If necessary, these nozzles can be mounted in an adjustable manner to move with the device to a position that ensures the desired lateral deflection of the flow of this material 42.

The control and adjustment of the side deflection of the flow of this material 42 not only depends on the precise positioning or adjustment of these nozzles 43 and 44, but also, for example, by changing or adjusting the pressure and flow of the compressed air. Achievable. Depending on the design of the mold or the product to be manufactured, the pressure of the air jet can be varied or turned off completely. Differently designed nozzles can change the shape of the same air jet.

According to this second aspect of the invention, the operation of the device involves the reinforcement fibers along a longitudinal band L, which at some point is substantially reduced to half its width. The deposition of the contained polyurethane mixture is briefly described below, as shown in FIGS.

First, as shown by the solid line in FIG. 4, the mixing device 10 is placed on the upper left corner of the mold 40. The appropriate polyurethane chemistry is supplied and mixed in the mixing chamber 11, and the resulting mixture of liquid polyurethane material is mixed with the reinforcing fibers 7 in the discharge duct 12. When the mixing device 10 is moved and both nozzles 43 and 44 are actuated alternately along the first part of the band L, the flow of material 42 exiting the discharge duct 12 is Due to the alternating air jets generated by the nozzles 43 and 44, they are repeatedly deviated left and right. In this way, as shown in FIGS. 5 and 6, during the first stroke of the mixing device 10, at both strips L1 and L2,
At substantially the same time, the entire width of the band L can be covered by the flow of the material 42 until the device 10 reaches the narrowest part of the band L.

In the narrow portion of the band L, one of the two air blowing nozzles 43 or 44 is instantaneously deactivated, or the air flow can be partially reduced. Once the mixing device 10 reaches the end of its travel path, it shifts laterally to its adjacent band, as shown by the dashed line in FIG. 4, and then the two alternating air jets of nozzles 43 and 44. Is actuated again to move along the entire length of the mold, and thus until the entire surface of the cavity 41 of the mold 40 is covered.

During the manufacture of large products, the reciprocating motion of the mixing device 10 can be on the order of approximately one second or slightly longer. Consequently, the frequency at which this alternating air jet is generated by the nozzles 43 and 44 must be relatively high. For example, depending on the characteristics of the solenoid valve 46 and the reinforcement material, its flow rate or other process requirements for a particular production (these are well known to those skilled in the art), the frequency resulting from the air jet nozzle may be , Between about 20 Hz and 60 Hz or more.

In the exemplary embodiment, these nozzles 43 and 44 are arranged opposite one another and are oriented perpendicular to the axis of the discharge duct 12 for this material 42 flow. However, the nozzles or even further nozzles can be arranged and oriented differently.
For example, the nozzles 43, 44 can be oriented at an angle to the axis of the discharge duct 12 and toward the mold or the underlying substrate. In each case, a polyurethane material containing filler and / or reinforcement material is produced, and during each stroke of the mixing device, is significantly wider and much larger than the band obtained using conventional devices. Can cover the band. Therefore, this improvement makes it possible to significantly reduce the time required to spray or place the reinforced polyurethane material on the entire surface of the mold. It is also possible to reduce the reciprocating speed of the entire device. On the other hand, with this improvement,
This device makes it possible to cover even wider surfaces with sufficient assurance that the filling material and / or reinforcing material is filled into the polyurethane mixture, and to substantially fill any mold or underlying substrate cavity. It becomes possible to distribute uniformly.

With reference to FIG. 7, another embodiment of the present invention will be described. The blowing nozzles 43, 44 are applied to a low pressure mixing device or stirrer, as shown here.

According to the example of FIG. 7, this mixer has a hollow body 51 substantially closed by a cover 51,
Define a mixing chamber 52 having

Inside the mixing chamber 52, a rotor member 54 is provided and connected to a motor (not shown) by a rotating shaft 55. In the embodiment of FIG.
The rotor 54 is provided with a set of pins 55 arranged on one or more coaxial circumferences with the axis 54 ′ of the rotor 54, the pins 55 projecting from a bottom wall 57 of the mixing chamber 52. With one set of pins 56. FIG.
Reference numerals 58 and 59 indicate inlet openings for chemical components to be mixed in the mixing chamber 52.

According to the embodiment of FIG. 7 of the present invention, the blowing nozzles 60, 61 generate an air jet at the outlet 53 of the mixing chamber 52 and flow out of the mixing chamber through the outlet hole 53. It is again provided to divert the flow of the polyurethane mixture to the side.

As described above in the example of FIG. 5, these blowing nozzles 60 and 61 are connected to the compressed air source 62 by the control valve 63 under the control of the control unit 64.

While the invention has been described in connection with what is presently considered to be its most practical and preferred embodiment, the invention is not limited to the disclosed embodiment, but, on the contrary, It is intended to cover various modifications and equivalent means within the spirit and scope of the above.

[0129]

As described above, according to the present invention, there is provided a high-pressure self-cleaning mixing apparatus for producing a molded part of a polyurethane material containing a filler. This mixing device answers the need for a very lightweight device with a simple design. This design also allows for rapid displacement during each reversal or change in motion of the device without creating significant resistance to acceleration.

According to another aspect of the present invention, there is provided a mixing device for improving the filling of a filler in the mixing device. This filling occurs in the molded part under high turbulent conditions such that the filler is strongly bonded to the polyurethane material of the molded composite part.

According to yet another aspect of the present invention, there is provided a high pressure self-cleaning mixing device for practical and universal use. Any type or nature of fluidized packing material can be further supplied to the device by an air stream transported over the stream.

Thus, the device of the present invention can be used for many applications. For example, it can be used in molding a wide range of mechanical or structural parts. The device can also be used with both rigid and flexible types of expanded foam, in which the filler can be advantageous in new, reused or recycled materials, and therefore more economical Enables the production of compact and relatively low cost molded parts.

According to another aspect of the present invention, there is provided a method and apparatus for the production of a polyurethane material, and the deposition of this mixture in a short time over a large area of a substrate or mold cavity. Can be The method according to the invention can be carried out in a relatively short time, with a homogeneous distribution of this mixture during the deposition. All of this is achieved without a cumbersome and complicated operating system for moving the mixing device itself.

According to an aspect of the present invention, there is provided a method and apparatus as defined above, wherein the mixing device is capable of moving at a relatively low speed, and thus is associated with inertial phenomena and inversion or change in the motion of the device. Methods and apparatus are provided that reduce the problems noted above.

According to yet another aspect of the present invention, there is provided a method and an apparatus for producing a polyurethane material as defined above, further comprising allowing a uniform distribution of the sprayed or deposited material. And a method for producing a good-quality product and permitting appropriate control of the spraying or deposition of the released polyurethane material and / or reinforcement material transported by flow from this device, for example into a mold, and An apparatus is provided.

According to yet another aspect of the present invention, there is provided a method and apparatus as defined above, the dimensional characteristics of which, the shape of the mold or molded part, and the mold on which the device and its surface are deposited. Both methods and devices are provided that allow for the control of the deposition of polyurethane material and / or reinforcement material transported on a stream, depending on the relative movement required between the reinforcement material and the polyurethane material.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a first embodiment of a high-pressure mixing device according to the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is an enlarged detail view showing a second embodiment of the mixing chamber of the device according to the invention.

FIG. 4 is a top view of a mold and a high-pressure mixing device provided with an air jet, illustrating a method according to the invention.

5 is a cross-sectional view taken along line VV of FIG. 4 when generating an air jet on one side of the flow of material discharged into the mold.

FIG. 6 is a sectional view similar to FIG. 5, but using an air jet generated on the side opposite to the side shown in FIG. 5;

FIG. 7 is a cross-sectional view of a low-pressure mixing device using an air jet, illustrating still another embodiment of the present invention.

[Explanation of symbols]

 10 Main unit 11 Mixing chamber 12 Release duct 13 Cleaning member 27 Cleaning member 30 Shaft hole (supply channel) 43, 44 Blow nozzle 52 Mix chamber 60, 61 Blow nozzle

Continued on the front page (51) Int.Cl. ⁶ Identification symbol FI B01F 15/00 B01F 15/00 DB29B 7/86 B29B 7/86 B29C 45/18 B29C 45/18 // B29K 75:00 (71) Application People 598066293 65, Via G. Ferraris, 21042 Carno Pertus ella (VA) Italy

Claims (42)

[Claims] 1. A high pressure self-cleaning mixing device for producing a reinforced polyurethane mixture, in which a polyurethane mixture is compounded with a fluidized filler material, the device comprising: at least a first and a second. A mixing chamber for mixing the polyurethane components; a discharge duct (the mixing chamber is open at the rear end of the discharge duct); an advanced position for closing the mixing chamber and the mixing chamber facing the discharge duct. Between the retracted position to open,
An elongate cleaning member reciprocable in the discharge duct; and a supply channel for supplying fluidized packing material;
The supply channel extending longitudinally relative to the cleaning member, wherein the supply channel opens into a mixing area at a rear end of the discharge duct proximate an outlet opening of the mixing chamber; In the polyurethane mixture,
Under high turbulence conditions, the mixing chamber exits into the discharge duct. 2. The apparatus of claim 1, wherein the supply channel is provided as one single part with the elongate cleaning member. 3. The apparatus of claim 1, including means for diverting the flow of the polyurethane mixture exiting the mixing chamber, wherein the means for diverting the flow is disposed at a forward end of the cleaning member. 4. The apparatus according to claim 3, wherein the means for diverting the flow comprises a conical surface tapering in the flow direction of the mixture in the discharge duct. 5. The apparatus of claim 4, wherein said conical surface defines an annular channel at the rear end of said discharge duct for dispensing said polyurethane mixture. 6. The apparatus according to claim 4, further comprising means for adjusting a position of a front end of said cleaning member with respect to an outlet opening of said mixing chamber. 7. The cleaning member is connected to a reciprocating piston of a control cylinder, thereby adjusting a stop position of the cleaning member to a retracted position of the reciprocating piston of the control cylinder of the cleaning member. The apparatus of claim 1, further comprising: 8. The apparatus of claim 1, wherein said discharge duct has a length no greater than twice its diameter. 9. The apparatus of claim 1, wherein the supply channel is provided by a longitudinally extending hole on one side of the cleaning member relative to the axis of the discharge duct. 10. The apparatus of claim 9, wherein the well of the cleaning member is offset to a side of the discharge duct opposite an outlet opening of the mixing chamber. 11. A high pressure self-cleaning mixing device for producing a fiber reinforced polyurethane material, the apparatus comprising: a mixing chamber for mixing at least a first and a second polyurethane component; A cleaning member and first control means for reciprocating the first cleaning member in the mixing chamber; a discharge duct extending at an angle toward an outlet opening of the mixing chamber; a second cleaning member. And a second control means for reciprocating the second cleaning member in the discharge duct; a fiber supply channel movably supported by the cleaning member of the discharge duct from an advanced state and a retracted state. In the second cleaning member,
Extending in the longitudinal direction, in the retracted state of the second cleaning member,
An axially open fiber feed channel proximate an outlet opening of the mixing chamber; and a divert flow of polyurethane mixture exiting the mixing chamber in a longitudinal direction of the discharge duct. A surface member at the front end of the second cleaning member. 12. The high pressure mixing device of claim 11, wherein the surface member that diverts the flow of the polyurethane mixture includes a conical surface at a forward end of the cleaning member of the discharge duct. 13. The apparatus of claim 13, further comprising an annular channel for dispensing the polyurethane mixture from the mixing chamber to the discharge duct, wherein the annular channel includes a conical tip of the second cleaning member and an annular channel of the mixing chamber. The high pressure mixing device according to claim 11, wherein the outlet opening is provided between the outlet duct and a rear surface of the discharge duct proximal thereto. 14. The high pressure mixing of claim 11, further comprising an adjustable throttle member that throttles the outlet opening of the mixing chamber, wherein the throttle member includes the cleaning member of the discharge duct. device. 15. The high pressure mixing device according to claim 11, wherein the fiber supply channel extends longitudinally with respect to the discharge duct on one side of the cleaning member. 16. The control means for the cleaning member of the discharge duct comprises a reciprocating piston of a control cylinder, whereby the fiber supply channel is provided as a single part with the cleaning member for the discharge duct, The high-pressure mixing device according to claim 11, wherein the rear end extends through the piston member of the control cylinder. 17. A method of making a reinforced polyurethane material, the method comprising the steps of: providing at least a flow mixture of first and second polyurethane components; Compounding with a stream of filler material; distributing a product stream of filler and polyurethane blend material to a forming surface; and, during the dispensing, the product stream with at least one air jet. The process of deflecting to the side by colliding. 18. The method of claim 17, further comprising diverting the product stream with intermittent air jets. 19. The method of claim 18, wherein the product stream is alternately diverted in opposite directions. 20. The product stream is diverted with intermittent air jets at a frequency greater than about 20 Hz.
The method described in. 21. The frequency of the intermittent air jet is:
21. The method of claim 20, wherein the method ranges from about 20 Hz to about 60 Hz. 22. The method of claim 18, wherein the product stream is diverted by an intermittent air jet at a frequency greater than about 60 Hz. 23. The method of claim 17, wherein the product stream is diverted laterally by a continuous air jet. 24. The product stream is diverted and distributed by a mixing device on an underlying shaped surface by reciprocating motion of the same mixing device, and the air jet is applied to the mixing device by the mixing device. 18. The method of claim 17, having a higher frequency than the reciprocating motion. 25. The method of claim 24, wherein at least one of the air jets is temporarily interrupted at a predetermined location during movement of the mixing device. 26. A mixing device for producing a polyurethane mixture, the device comprising: a mixing device having a mixing chamber and a discharge duct for the flow of the polyurethane mixture from the mixing chamber; and Air jet generating means for diverting the generated flow of the delivered mixed material to the side. 27. The air jet generating means includes at least one air blowing nozzle whereby the nozzle impinges an air jet on a side of a product flow of a mixed material delivered onto a forming surface. 27. The mixing device according to claim 26, wherein the mixing is performed. 28. The apparatus of claim 26, further comprising valve control means for connecting said air jet generating means to a source of compressed air.
3. The mixing device according to item 1. 29. A program for selectively connecting at least first and second blowing nozzles for generating an air jet on an opposite side of the product stream of the compounding material, the blowing nozzles selectively connected to a source of compressed air. 27. The mixing device according to claim 26, further comprising a gasification control unit. 30. The mixing device of claim 29, wherein said control means is programmed to alternately connect said nozzles to said source of compressed air. 31. The blowing nozzle is supported in an adjustable manner by the mixing device.
8. The mixing device according to 7. 32. The mixing apparatus according to claim 27, wherein the blowing nozzle is supported by the mixing device in an orientable manner. 33. The blow nozzle is oriented at right angles to the product stream of compounding material.
8. The mixing device according to 7. 34. The blowing nozzle is oriented at an angle toward the direction of the product flow of the compounding material when the material is delivered onto an underlying shaped surface; A mixing device according to claim 27. 35. The control means is programmed to selectively enable either simultaneous or alternating air jets on the side of the product stream of the compounding material. 3. The mixing device according to item 1. 36. The mixing device according to claim 26, wherein the mixing device is a high-pressure mixing device. 37. The mixing device according to claim 26, wherein said mixing device is a low pressure mixing device. 38. The mixing device according to claim 26, wherein the means for supplying the filling material comprises a supply conduit coaxially arranged with respect to the discharge duct and an opening to the discharge duct. 39. The mixing apparatus according to claim 26, wherein the means for supplying the filling material is arranged laterally on a side of the mixing device. 40. A mixing device for producing a reinforced polyurethane mixture, the device comprising: a mixing device having a mixing chamber and a discharge duct for the flow of the polyurethane mixture from the mixing chamber; Means for feeding and mixing the mixture into the stream of polyurethane mixture delivered by the mixing device; and means for generating air jets to deflect the product stream of the compound material delivered by the mixing device and the supply means to the side. 41. A high pressure self-cleaning mixing device for producing a reinforced polyurethane mixture, the device comprising:
A mixing chamber for mixing at least the first and second polyurethane components; a discharge duct (the mixing chamber is open at a rear end of the discharge duct); a traveling position for closing the mixing chamber; An elongate cleaning member reciprocable between a retracted position that opens a chamber toward the discharge duct; and a supply channel for supplying fluidized fill material, the cleaning channel extending longitudinally with respect to the cleaning member. The supply channel; whereby the supply channel opens at the rear end of the discharge duct proximate to the outlet opening of the mixing chamber, whereby the polyurethane mixture is exposed to the mixing chamber under high turbulence conditions Exiting to the discharge duct, and the apparatus comprises, at the outlet of the mixing device, an air jet generating means for deflecting the flow of compounding material laterally. Including. 42. A high pressure self-cleaning mixing device for producing a fiber reinforced polyurethane material, the device comprising: a mixing chamber for mixing at least a first and a second polyurethane component; a first cleaning member. And a first control means for reciprocating the first cleaning member in the mixing chamber; a discharge duct extending at an angle from an outlet opening of the mixing chamber; a second cleaning member, and the discharge duct. A second control means for reciprocating the second cleaning member with: a fiber supply channel movably supported by the second cleaning member of the discharge duct, wherein the fiber supply channel is vertical in the second cleaning member. A fiber feed channel extending axially and axially open at a rear end of the discharge duct in a retracted position of the second cleaning member, adjacent to an outlet opening of the mixing chamber. The said; At the front end of the second cleaning member for diverting the flow of the polyurethane mixture exiting the mixing chamber; and at the outlet of the mixing device,
Air jet generating means for deflecting the flow of compounding material to the side.